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| author |   Nikita Zhandarovich <n.zhandarovich@fintech.ru> | 2023-04-18 07:04:30 -0700 |
|---|---|---|
| committer |   Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2023-05-11 14:11:59 +0300 |
| commit | 0ff80028e2702c7c3d78b69705dc47c1ccba8c39 (patch) | |
| tree | a750911e1b85077fa0f81541e1b0d79487b32aa7 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | drm/i915: Fix NULL ptr deref by checking new_crtc_state (diff) | |
| download | wireguard-linux-0ff80028e2702c7c3d78b69705dc47c1ccba8c39.tar.xz wireguard-linux-0ff80028e2702c7c3d78b69705dc47c1ccba8c39.zip | |
drm/i915/dp: prevent potential div-by-zero
drm_dp_dsc_sink_max_slice_count() may return 0 if something goes
wrong on the part of the DSC sink and its DPCD register. This null
value may be later used as a divisor in intel_dsc_compute_params(),
which will lead to an error.
In the unlikely event that this issue occurs, fix it by testing the
return value of drm_dp_dsc_sink_max_slice_count() against zero.
Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
Fixes: a4a157777c80 ("drm/i915/dp: Compute DSC pipe config in atomic check")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230418140430.69902-1-n.zhandarovich@fintech.ru
(cherry picked from commit 51f7008239de011370c5067bbba07f0207f06b72)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions